{"id":30663,"date":"2026-06-18T07:02:51","date_gmt":"2026-06-18T07:02:51","guid":{"rendered":"https:\/\/doingcable.com\/?p=30663"},"modified":"2026-06-18T07:10:07","modified_gmt":"2026-06-18T07:10:07","slug":"what-does-a-stranding-machine-do","status":"publish","type":"post","link":"https:\/\/doingcable.com\/fr\/what-does-a-stranding-machine-do\/","title":{"rendered":"\u00c0 quoi sert une machine de retordage ?"},"content":{"rendered":"<p>A <strong>rigid stranding machine<\/strong>, commonly known as a <strong>cage strander<\/strong> ou <strong>rigid frame strander<\/strong>, is the cornerstone equipment in modern wire and cable manufacturing for producing large-section, high-precision conductors. Its core function is to helically twist multiple individual metal wires (copper, aluminum, aluminum alloy, or steel) around a central core wire or previous stranded layer, creating a single, mechanically robust, electrically efficient, and flexible conductor or cable core.<\/p>\n\n\n\n<p>Stranding transforms loose individual wires into a unified structure with controlled lay length (pitch), direction, and compaction. This process is essential for cables that must withstand mechanical stress, environmental exposure, and high electrical loads while maintaining optimal conductivity and flexibility.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1067\" height=\"800\" src=\"https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Cage-Stranding-and-Screening-Line-1067x800.webp\" alt=\"\" class=\"wp-image-30664\" srcset=\"https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Cage-Stranding-and-Screening-Line-1067x800.webp 1067w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Cage-Stranding-and-Screening-Line-400x300.webp 400w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Cage-Stranding-and-Screening-Line-768x576.webp 768w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Cage-Stranding-and-Screening-Line-1536x1152.webp 1536w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Cage-Stranding-and-Screening-Line-2048x1536.webp 2048w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Cage-Stranding-and-Screening-Line-16x12.webp 16w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Cage-Stranding-and-Screening-Line-430x323.webp 430w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Cage-Stranding-and-Screening-Line-700x525.webp 700w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Cage-Stranding-and-Screening-Line-250x188.webp 250w\" sizes=\"(max-width: 1067px) 100vw, 1067px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Cage Type vs Rigid Stranding Machine \u2013 Clarifying the Terminology<\/h3>\n\n\n\n<p>In industry practice, <strong><a href=\"https:\/\/doingcable.com\/fr\/produit\/rigid-stranding-machine\/\">Machine \u00e0 c\u00e2bler de type cage<\/a><\/strong> et <strong><a href=\"https:\/\/doingcable.com\/fr\/produit\/cage-type-stranding-machine\/\">Rigid Stranding Machine (Rigid Frame Strander)<\/a><\/strong> refer to the same class of heavy-duty equipment.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The \u201ccage\u201d is the solid, cylindrical rotating frame that securely holds multiple wire bobbins (pay-off reels).<\/li>\n\n\n\n<li>\u201cRigid\u201d emphasizes the unyielding steel construction of this frame, which provides exceptional stability, precise tension control, and balance even when handling heavy bobbins at high rotational speeds.<\/li>\n<\/ul>\n\n\n\n<p>Some manufacturers distinguish \u201crigid frame\u201d variants as those without a separate external pay-off stand (bobbins load directly into the cage stands), simplifying the line and enabling higher speeds. In practice, both terms describe non-backtwist stranding machines optimized for large-section conductors. This design outperforms tubular stranders for heavy, high-volume production and offers superior structural integrity compared to more flexible or planetary systems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Key Features &amp; Mechanics of a Rigid \/ Cage Strander<\/h3>\n\n\n\n<p><strong>1. Robust Cage Structure<\/strong> The machine features one or more heavy, precision-machined steel cages (typically configured as 6B, 12B, 18B, 24B, or 30B+ positions). Bobbins are arranged in multiple rows as close as possible to the rotation axis to maximize speed and minimize centrifugal forces. Modern cages are CNC-machined and stress-relieved for long-term rigidity.<\/p>\n\n\n\n<p><strong>2. Stranding Process<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Individual wires are paid off from bobbins mounted inside the rotating cage.<\/li>\n\n\n\n<li>As the cage spins at controlled RPM, wires are drawn forward and twisted helically around the central core (or previous layer) at a precise angle and lay length.<\/li>\n\n\n\n<li>The lay length is determined by the ratio of cage rotation speed to capstan (haul-off) linear speed.<\/li>\n\n\n\n<li>Pre-twist or pre-spiral devices prepare wires (especially for sector-shaped or Milliken conductors).<\/li>\n\n\n\n<li>Compacting dies at the stranding point produce round or profiled (sector\/trapezoidal) conductors with high fill factor and excellent surface quality.<\/li>\n\n\n\n<li>The finished stranded conductor is pulled by dual wheel-type capstans and wound onto large take-up drums.<\/li>\n<\/ul>\n\n\n\n<p><strong>3. Advanced Tension &amp; Control Systems<\/strong> Pneumatic or electromagnetic brakes, combined with PLC-controlled automatic tension compensation, maintain constant wire tension regardless of bobbin fill level. This ensures uniform lay, prevents loose strands or bird-caging, and delivers consistent electrical and mechanical performance.<\/p>\n\n\n\n<p><strong>4. Modern Bobbin Loading Systems<\/strong> Heavy bobbins (often 500\u2013800 mm flange diameter) are managed by hydraulic or motorized side-loading systems, electric trolleys with frequency conversion, or fully automatic loading\/unloading. These reduce changeover time dramatically and improve operator safety and ergonomics.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"750\" height=\"500\" src=\"https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Stranding-Machines.webp\" alt=\"\" class=\"wp-image-30665\" style=\"width:1066px;height:auto\" srcset=\"https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Stranding-Machines.webp 750w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Stranding-Machines-400x267.webp 400w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Stranding-Machines-18x12.webp 18w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Stranding-Machines-430x287.webp 430w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Stranding-Machines-700x467.webp 700w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Rigid-Stranding-Machines-250x167.webp 250w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Why the Rigid Frame Design Matters<\/h3>\n\n\n\n<p>Unlike tubular stranders (better for smaller sections and quick changeovers) or double-twist bunchers (continuous high-speed operation but different twist characteristics), the rigid cage design excels in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Superior balance and vibration control with heavy loads<\/li>\n\n\n\n<li>Precise, repeatable tension for large cross-sections (up to 1,400 mm\u00b2 aluminum)<\/li>\n\n\n\n<li>Excellent compaction and surface quality for high-voltage and critical infrastructure cables<\/li>\n\n\n\n<li>Non-backtwist stranding ideal for compacted round, sector, and Milliken conductors<\/li>\n\n\n\n<li>High productivity for long-length production runs typical in power grid and renewable energy projects<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Applications principales<\/h3>\n\n\n\n<p>Rigid stranding machines are indispensable for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Medium &amp; High Voltage (MV\/HV) Power Cable Cores<\/strong> \u2014 Round compacted or Milliken segmented conductors that minimize skin and proximity effects for superior AC performance in large cross-sections.<\/li>\n\n\n\n<li><strong>Overhead Transmission Conductors<\/strong> \u2014 ACSR (Aluminum Conductor Steel Reinforced), AAAC, ACCC, and ACSS for power grids, including major infrastructure projects in the Middle East and globally.<\/li>\n\n\n\n<li><strong>Submarine, Offshore &amp; Wind Farm Cables<\/strong> \u2014 Robust cores that withstand mechanical and environmental stresses.<\/li>\n\n\n\n<li><strong>Sector-Shaped &amp; Profiled Conductors<\/strong> \u2014 Pre-spiraled segments for compact, high-fill-factor power cables.<\/li>\n\n\n\n<li><strong>Steel Wire Armoring &amp; OPGW<\/strong> \u2014 In certain configurations for added mechanical protection or optical fiber composite cables.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" width=\"855\" height=\"570\" src=\"https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/ACSR-Conductor-1.jpg\" alt=\"\" class=\"wp-image-30666\" style=\"width:855px;height:auto\" srcset=\"https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/ACSR-Conductor-1.jpg 855w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/ACSR-Conductor-1-400x267.jpg 400w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/ACSR-Conductor-1-768x512.jpg 768w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/ACSR-Conductor-1-18x12.jpg 18w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/ACSR-Conductor-1-430x287.jpg 430w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/ACSR-Conductor-1-700x467.jpg 700w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/ACSR-Conductor-1-250x167.jpg 250w\" sizes=\"(max-width: 855px) 100vw, 855px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Technical Specifications (Typical JLK \/ Rigid Frame Series \u2013 Customizable)<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Param\u00e8tre<\/th><th>Typical Range (\u03a6630 model example)<\/th><th>Notes<\/th><\/tr><\/thead><tbody><tr><td>Bobbin Configurations<\/td><td>6B \/ 12B \/ 18B \/ 24B \/ 30B+<\/td><td>Multi-layer stranding<\/td><\/tr><tr><td>Single Wire Diameter<\/td><td>Copper 1.5\u20135.0 mm; Aluminum 1.8\u20136.6 mm<\/td><td>Depends on alloy &amp; speed<\/td><\/tr><tr><td>Max. Cage Rotation Speed<\/td><td>150\u2013325 rpm (varies by cage &amp; wire type)<\/td><td>Individual motor drive enables higher speeds<\/td><\/tr><tr><td>Max. Stranded Cross-Section<\/td><td>Aluminum up to ~1,400 mm\u00b2; Copper ~1,000 mm\u00b2<\/td><td>Compacted<\/td><\/tr><tr><td>Lay Length (Pitch)<\/td><td>Stepless adjustable, wide range<\/td><td>PLC controlled<\/td><\/tr><tr><td>Drive System<\/td><td>Independent AC motor per cage + capstan<\/td><td>No ground shaft\/gearbox \u2013 lower maintenance, higher efficiency<\/td><\/tr><tr><td>Tension Control<\/td><td>Pneumatic \/ electromagnetic + auto compensation<\/td><td>Constant tension<\/td><\/tr><tr><td>Loading<\/td><td>Hydraulic \/ electric side or front auto loader<\/td><td>Fast bobbin change<\/td><\/tr><tr><td>Control<\/td><td>Siemens\/equivalent PLC + HMI<\/td><td>Full synchronization &amp; safety interlocks<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Product Advantages \u2013 Why Leading Cable Manufacturers Choose Rigid Stranding Lines<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Qualit\u00e9 fiable<\/strong> \u2014 Precision-engineered rigid frames, premium components (Siemens PLC, high-grade bearings), and advanced tension systems deliver consistent, high-spec conductors that meet IEC, ASTM, and customer standards.<\/li>\n\n\n\n<li><strong>High Productivity &amp; Efficiency<\/strong> \u2014 Individual motor drives eliminate traditional gearbox limitations, enabling higher speeds, stepless pitch adjustment, lower energy consumption, and reduced noise.<\/li>\n\n\n\n<li><strong>Operational Excellence<\/strong> \u2014 Automatic bobbin loading, pre-twist devices, disconnection sensors, and safety systems minimize downtime and protect both operators and product quality.<\/li>\n\n\n\n<li><strong>Customization &amp; Technical Solutions<\/strong> \u2014 Configurations tailored to your exact cable portfolio (round, sector, Milliken, ACSR, armoring, etc.), plant layout, and capacity requirements. Full line integration with drawing, extrusion, and testing equipment available.<\/li>\n\n\n\n<li><strong>Long-Term Partnership Value<\/strong> \u2014 Robust construction for decades of service, comprehensive technical support, spare parts availability, and process optimization expertise.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Used-Steel-Wire-Armoring-Machine-Line-for-Sale-1.webp\" alt=\"\" class=\"wp-image-30668\" srcset=\"https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Used-Steel-Wire-Armoring-Machine-Line-for-Sale-1.webp 800w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Used-Steel-Wire-Armoring-Machine-Line-for-Sale-1-400x300.webp 400w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Used-Steel-Wire-Armoring-Machine-Line-for-Sale-1-768x576.webp 768w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Used-Steel-Wire-Armoring-Machine-Line-for-Sale-1-16x12.webp 16w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Used-Steel-Wire-Armoring-Machine-Line-for-Sale-1-430x323.webp 430w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Used-Steel-Wire-Armoring-Machine-Line-for-Sale-1-700x525.webp 700w, https:\/\/doingcable.com\/wp-content\/uploads\/2026\/06\/Used-Steel-Wire-Armoring-Machine-Line-for-Sale-1-250x188.webp 250w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Ready to Optimize Your Conductor Production?<\/h3>\n\n\n\n<p>Whether you are expanding capacity for Middle East infrastructure projects, upgrading for higher-spec HV cables, or seeking reliable equipment with strong after-sales support, our rigid stranding solutions deliver measurable performance and ROI.<\/p>\n\n\n\n<p><strong><a href=\"https:\/\/doingcable.com\/fr\/\">Demande d&#039;informations<\/a><\/strong> \u2014 Contact our technical team for a detailed proposal, layout design, or on-site consultation tailored to your production goals.<\/p>","protected":false},"excerpt":{"rendered":"<p>A rigid stranding machine, commonly known as a cage strander or rigid frame strander, is the cornerstone equipment in modern<\/p>","protected":false},"author":1,"featured_media":30670,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[565],"tags":[],"class_list":["post-30663","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized-en"],"_links":{"self":[{"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/posts\/30663","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/comments?post=30663"}],"version-history":[{"count":1,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/posts\/30663\/revisions"}],"predecessor-version":[{"id":30669,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/posts\/30663\/revisions\/30669"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/media\/30670"}],"wp:attachment":[{"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/media?parent=30663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/categories?post=30663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/doingcable.com\/fr\/wp-json\/wp\/v2\/tags?post=30663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}